"We were both very private and we realized we were better as friends," Groban said. "We're very very good friends to this day, she's the best. But I was not expecting [her to say that]. That was a double-take and a spit. It's very sweet of her to say that, [but] I listened to the lyrics of the song and I'm like, 'I never owned a Mustang. I don't have a tattoo. Are you sure that's about me?' I'm very flattered by it but I was very surprised by it too."

The sixth and final single off of Perry's massively successful Teenage Dream, "The One That Got Away" tells the story of a lost love, and peaked at No. 3 on the Billboard Hot 100. It includes the lyrics "In another life, I would be your girl / We keep all our promises, be us against the world / In another life, I would make you stay / So I don't have to say you were the one that got away / The one that got away."